Guru nanak engineering works [regd.] manufactures the taper boring attachment which is a horizontal boring machine attachment, under the brand name karam. This lathe machine manufacturing firm has won many awards such as the national award 1977, udyog patra, transworld service award 1978 & transworld gold medals 1978, 1979, 1979-80, 1980 & 1981 for "karam" horizontal boring machines. Taper boring attachment is suitable for machining taper bore in a job. Taper boring up to 30 degrees can be facilitated with this special attachment. Maximum length of taper in a bore which can be done with the standard tool holder of this taper boring attachment is 12 inches. Minimum 4" diameter of taper bore & maximum 20" diameter of taper bore is possible with this taper boring attachment.